SphinxI hope this becomes the engine for a tiny Batmobile driven by a kitten.

bopetonNo gaskets or o-rings, let alone lubricant. It's gotta be air or something. (There's some hint of oil on the rods in one of the shots, but inconclusive, and it didn't show him making an oil pan or lubricating individual parts.)

Still, humans really amaze me sometimes.

HarrietTubmanPIBut air would work on the same principle, or close to it. You can get the metal parts the right size, but making spark plugs that size would be very difficult to machine. Plus, having an engine like that run indoors on ordinary gasoline would require o-rings, a radiator, and a lot of complexity that would probably be very dangerous for something that size.

Still, this is an amazing piece of work.

CrimsonHyperSlothYou can see him oil it, I can't find the time mark immediately. It's a little round disc with a tube coming out of it.

I like to think he just knocked this out on a weekend to send to some rival, and they build increasingly smaller engines as some sort of feud.